TLIK: “It was approximately in 1947, and was part of a casual conversation among a group of baalei batim in a shul on the Lower East Side.”
So you are disputing what Rabbi Hoffman wrote that “some trace it to Rav Menachem Mendel of Riminov (1745-1815), one of the five main disciples of the Rebbe Elimelech of Lisensk. Others trace it to Rav Shalom of Stropkov (1855-1940) (See Yisroel V’Hazmanim, Rav Dovid Rossov p. 291). It is clear, however, that Rav Shalom was quoting the Riminover and did not make it up himself. The original Sfer of the Riminover is not easily accessible as only the first volume is readily extant.”
If it was written in a sefer of R’ Mendel that we no longer have, how can you be certain that he descendants know or don’t know of it?
Maybe it’s a segula maybe it’s not. Maybe it’s a true minhag, maybe not. Is there anything wrong with spending 5 minutes reading pesukim of the torah with it’s targum?